C0379 2018 Chevrolet Silverado Code - Front Axle Switch Circuit
Quick Answer
The front axle control circuit consists of an electric motor actuator that engages and disengages the front axle. Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C0379 2018 Chevrolet Silverado indicates Front Axle Switch Circuit.
- Common causes
- Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C0379 2018 Chevrolet Silverado Description
The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator circuit, a Front Axle Actuator Control circuit, and a ground circuit.
When a shift to 4WD Auto, 4WD High, or 4WD Low is requested, the Transfer Case Control Module engages the front axle by grounding the front axle actuator control circuit through a current limiting driver.
This Diagnostic Trouble Code (DTC) will be set when a short to ground, short to voltage, or open circuit is detected.
What are the Possible Causes of the DTC C0379 2018 Chevrolet Silverado?
- Faulty Front Axle Engagement Actuator
- Front Axle Engagement Actuator harness is open or shorted
- Front Axle Engagement Actuator circuit poor electrical connection
- Faulty Transfer Case Control Module
How to Fix the DTC C0379 2018 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0379 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C0379 2018 Chevrolet Silverado Code
1. What does the OBDII code C0379 mean on a 2018 Chevrolet Silverado?
C0379 indicates an issue with the Front Axle Switch Circuit, which is responsible for engaging or disengaging the front axle in four-wheel-drive (4WD) systems.
2. What are the common symptoms of code C0379 in a 2018 Chevrolet Silverado?
Symptoms may include the 4WD system not engaging or disengaging properly, a Service 4WD message on the dashboard, or unusual noises from the front axle.
3. What causes the C0379 code on a 2018 Chevrolet Silverado?
Common causes include a faulty front axle actuator, damaged wiring or connectors in the switch circuit, or an issue with the transfer case control module (TCCM).
4. How can I diagnose the C0379 code on my 2018 Chevrolet Silverado?
Start by inspecting the wiring and connectors for damage or corrosion. Use a scan tool to monitor the TCCM's data and verify the operation of the front axle actuator.
5. Can a bad front axle actuator cause the C0379 code?
Yes, a malfunctioning front axle actuator is one of the most common causes of this code.
6. Is it safe to drive a 2018 Chevrolet Silverado with the C0379 code?
While the vehicle may still be drivable in 2WD mode, you could experience issues with 4WD functionality, which may be critical in certain driving conditions.
7. How do I fix the C0379 code on a 2018 Chevrolet Silverado?
Repair typically involves replacing the front axle actuator, repairing damaged wiring or connectors, or reprogramming the TCCM if necessary.
8. How much does it cost to fix the C0379 code on a 2018 Chevrolet Silverado?
Costs can vary but typically range from $150 to $500, depending on whether the actuator, wiring, or module needs repair or replacement.
9. Can a blown fuse cause the C0379 code on a 2018 Chevrolet Silverado?
Yes, a blown fuse in the circuit powering the front axle actuator could cause this code.
10. Will clearing the C0379 code solve the problem on my 2018 Chevrolet Silverado?
Clearing the code will turn off the warning temporarily, but the issue will recur until the underlying problem is resolved.
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